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Home > Tools & Hardware > Hardware Accessories > Spring > Double Coil Spring Washer With 1-Year Warranty and Mill Test Report Available

Double Coil Spring Washer With 1-Year Warranty and Mill Test Report Available

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Product Spotlights

Professional double coil spring washer with 1-year warranty and mill test report. Made from premium spring steel or stainless steel, available in various sizes and surface finishes. Offers superior vibration resistance and locking performance. Factory direct from a 25-year-experienced manufacturer with global export capability.

Negotiable MOQ: 1 Piece (Price negotiable depending on order volume and customization)

Key Specifications

Get Latest Price

Material:

Other, Spring Steel, Stainless Steel, Carbon Steel

Size:

Inner Diameter: 6mm-50mm; Outer Diameter: 12mm-80mm; Thickness: 1.5mm-6mm

Surface Treatment:

Plain, Zinc Plated, Phosphate, Dacromet

Contact Supplier Request Quote Chat Now

Anping County Boli Hardware Wiremesh Products Factory

2Yrs

Payment & Shipping

Payment Methods:

Port of Shipment:

tianjin shanghai qingdao

Delivery Detail:

Delivery time depends on order quantity.

Product Details
Company Profile
Contact Us

Material Other, Spring Steel, Stainless Steel, Carbon Steel

Size Inner Diameter: 6mm-50mm; Outer Diameter: 12mm-80mm; Thickness: 1.5mm-6mm

Surface Treatment Plain, Zinc Plated, Phosphate, Dacromet

Packaging Poly Bag, Carton, Wooden Pallet

Standard DIN 127, ASME B18.21.1, GB/T 93

Application Automotive, Construction, Machinery, Aerospace

Warranty 1 Year

Mill Test Report Available upon request

Anping County Boli Hardware Wiremesh Products Factory, a professional manufacturer established in 1998, proudly presents our Double Coil Spring Washer — a reliable solution for preventing loosening and ensuring secure fastening in demanding applications. Each washer is backed by a 1-year warranty and comes with a Mill Test Report upon request, guaranteeing traceable quality and material integrity. Our washers are engineered to deliver consistent performance, reduce maintenance costs, and enhance equipment safety.

Our double coil spring washers feature a unique double-coil design that provides superior elasticity and vibration resistance compared to standard single-coil washers. Below are key technical specifications and benefits:

Parameter	Details
Material	High-carbon spring steel, stainless steel (304/316), or alloy steel
Inner Diameter Range	6 mm – 50 mm (custom sizes available)
Outer Diameter Range	12 mm – 80 mm
Thickness Range	1.5 mm – 6 mm
Surface Finish	Plain, zinc plated, phosphate, Dacromet, or hot-dip galvanized
Packaging Options	Poly bag, carton, or wooden pallet (custom packaging upon request)

Product Features and Advantages:

Double Coil Design: Provides enhanced spring force and locking capability, effectively preventing fastener loosening under vibration and dynamic loads.
High-Quality Materials: Manufactured from premium spring steel or stainless steel, offering excellent fatigue resistance and long service life.
Surface Treatment Options: Multiple finishes available to improve corrosion resistance and adapt to various environmental conditions (e.g., zinc plating for indoor use, Dacromet for harsh outdoor environments).
Precision Manufacturing: Produced with advanced cold-forming technology, ensuring consistent dimensions and tight tolerances (ISO 2768-m class).
Mill Test Report: Each batch can be supplied with a detailed material test certificate, confirming chemical composition and mechanical properties — ideal for quality-sensitive projects.
1-Year Warranty: We stand behind our product quality; any defective items will be replaced free of charge within one year of purchase.

Benefits for Your Business:

Reduce downtime and maintenance costs by using washers that maintain tightness even in high-vibration machinery.
Improve safety and reliability in automotive, construction, and industrial equipment assemblies.
Customizable sizes and finishes allow seamless integration into existing designs without modification.
Fast delivery and flexible order quantities to meet both small-scale and bulk requirements.

With over 25 years of manufacturing experience, Anping County Boli Hardware Wiremesh Products Factory is a trusted supplier to industries across North America, South America, Europe, Asia, Africa, and Oceania. Our annual export value ranges from US$5 million to US$10 million, and we ship from major ports including Tianjin, Qingdao, Shanghai, and Foshan. We maintain strict quality control throughout production, ensuring every washer meets the highest standards.

We invite you to experience the reliability of our Double Coil Spring Washer. Contact us today for a quote or to request a sample. With our 1-year warranty and comprehensive mill test reports, you can purchase with confidence.

Frequently Asked Questions

What materials are used for double coil spring washers? We use high-carbon spring steel, stainless steel (304/316), and alloy steel. Custom materials are available upon request.
What sizes do you offer? Standard inner diameters range from 6mm to 50mm, outer diameters from 12mm to 80mm, and thicknesses from 1.5mm to 6mm. Custom sizes can be produced.
Can you provide a Mill Test Report? Yes, a Mill Test Report is available for each batch, showing chemical composition and mechanical properties. Please request at time of order.
How long is the warranty? We offer a 1-year warranty against manufacturing defects. Any defective washers will be replaced free of charge.
Are these washers suitable for heavy-duty applications? Absolutely. The double coil design provides high spring force, making them ideal for heavy machinery, automotive assemblies, and structural fastening.
What surface treatments do you offer? Common finishes include plain, zinc plated, phosphate, Dacromet, and hot-dip galvanized. Choose based on corrosion resistance requirements.
What is the typical packaging? Standard packaging is poly bags inside cartons, with wooden pallets for large orders. Custom packaging is available.
Do you offer samples for testing? Yes, we can provide samples. Please contact our sales team with your specifications and quantity.